#include<stdio.h>
int main()
{
int count = 0;
for (int i = 0; i <= 100; i++)
{
if ((i % 10) == 9 || (i / 10) == 9)
{
printf("%d\n", i);
count++;
}
}
printf("数字9总共出现了%d次\n", count);
return 0;
}
运行结果如下: